研究了非自由场一般房间内利用扬声器阵列进行声场重现的方法。建立了房间内声场重现的系统模型，利用正则化最小二乘法和L曲线法获得了实现声场内多个控制点定量重现的驱动信号频域特性，然后采用L曲线滤波器设计得到了阵列扬声器时域驱动信号。实际汽车噪声的重现结果表明：L曲线滤波方法能够实现扬声器驱动信号功率与声场重现误差之间的平衡，可以在非自由场内实现稳态声场的定量重现。
Abstract
L-curve-filtering method for sound field reproduction in a general room with loudspeaker array is studied. First, the system model used for the sound field reproduction in a room is established. Then, a regularized least-square and L-curve method are used to obtain the filtering property of the drive signals of speakers, which can reproduce the sound pressure of multi control points quantitatively. Finally, L-curve-filter is designed to obtain the time domain signals of loudspeaker array. The experiment result to reproduce a vehicle noise shows that L-curve-filtering method can balance the power of drive signals and reproduction error, it could realize the sound field reproduction in a general room.
关键词
声场重现 /
滤波方法 /
L曲线方法
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Key words
sound field reproduction /
filtering method;L-curve method
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参考文献
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